2020–2022 GM 3.0L Duramax 304 Stainless Steel DPF-Back Performance Exhaust Kit - Dual Exit LM2DPF Back Performance Exhaust Kit Dual Exit Wake up your truck with the DPF Back Performance Exhaust Kit. This free flowing exhaust system delivers increased fuel economy, reduced back pressure at the manifolds, more power, and quicker engine response. This DPF Back Performance Exhaust Kit is constructed of high grade, mandrel bent 304 stainless steel tubing, which offers superior durability and weather resistance. The kit utilizes factory hanger